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Issue 5, 2017
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AFM study on the adsorption of Hg2+ on natural molybdenum disulfide in aqueous solutions

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Abstract

The adsorption of Hg2+ on natural molybdenum disulfide has been studied using atomic force microscope (AFM). The AFM imaging clearly illustrated the adsorption of Hg2+ on the surface of molybdenum disulfide, and also hydration layers on the surfaces. It was found that the presence of a hydration layer on molybdenum disulfide surfaces hindered the Hg2+ adsorption. Also, it was observed that the Hg2+ adsorbed appeared in the form of multilayers. The first adsorbed Hg2+ layer might be mainly attributed to the complexation of Hg2+ with S atoms exposed on molybdenum disulfide surfaces, while the second one might be due to the electrostatic interaction between negatively charged molybdenum disulfide and the cation Hg2+.

Graphical abstract: AFM study on the adsorption of Hg2+ on natural molybdenum disulfide in aqueous solutions

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Article information


Submitted
25 Oct 2016
Accepted
04 Jan 2017
First published
04 Jan 2017

Phys. Chem. Chem. Phys., 2017,19, 3837-3844
Article type
Paper

AFM study on the adsorption of Hg2+ on natural molybdenum disulfide in aqueous solutions

F. Jia, X. Zhang and S. Song, Phys. Chem. Chem. Phys., 2017, 19, 3837
DOI: 10.1039/C6CP07302F

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